Antifriction bearing



atented Sept. 2% 192g.

STATES GFFlfiE.

JofiN F. mosses, or onicAoo, ILLINOIS, Assr oR, BY MESNE ASSIGNMENTS, TO w. H. MINER, INC., A CORPORATION or DELAWARE.

ANTIFRICTION BEARING.

Ap lication filed July 11,

This invention relates to improvements in anti-friction bearings.

Ohe object of the invention is to provide a simple, practical and relatively inexpensive roller bearing, especially adapted for railway car side bearing, in which theparts are so a l'ranged that' the anti-friction element is antomatically returned to normal central position underthe influence of gravity when free from load.

Another object of the invention is to pro vide a' rocker provided with a. seat against which said roller normally bears, together with a roller so connected to the rocker that in the normal central position of the rocker and during the rocking movement of the rocker within certain limits, the roller is positively held against movement with respect to said rocker, and upon further movement of the parts beyond the limits of the normal rocking movement of the rocker, the roller is moved outwardly from the seat so as to rotate freely, the arrangement being such as to hold the roller centered with respect to the rocker in all positions of the parts.

Other and further objects of the invention will more clearly and fully appear from the description and claims hereinafter following.

In the drawing, forming a part of this specification, Figure 1 is a vertical, sectional view taken through the ends of the body and truck bolsters of a railway car, showing my invention in connection therewith. Figure 2 is a sectional view of the invention on the line 22 of Figure 1.

Referring more particularly to the drawings, A indicates the underside of a body bolster, and B the upper side of the corre sponding opposed truck bolster. My improved side bearing is shown as applied to the truck bolster, and comprises broadly a housing C; an anti-friction element D; and a rocker E to which the anti-friction element D is suitably connected.

The housing C is provided with curved end walls 5, and flanges 6 adapted to be secured to the base 7 by rivets 8, the base member 7 being secured to the bolster portion B by means of rivets 9. The housing C is provided with side walls having laterally offset portions 10 providing guideways for the rocker E, such guideways serving to limit the rocking movement of the rocker.

1924. Serial No. 725,331.

The rocker E is provided with side standards 11, connected at their bottoms by an arcuate web or wall 12. The lower curved surface of said rocker, as indicated at 13, is adapted to bear and rock upon the bearing plate 7, the inner surface of the web 12 providing an arcuate seat 15. Portions of the standards 11, on the inner side thereof, are provided with elongated journal recesses 16, radially disposed with respect to the curved bearing surface of the rocker.

liotatably mounted in the journals 16 are the opposite trunnion means 17 forming part of a cylindrical shaft 18, upon which is mounted the anti-friction roller, such trunnion means being permitted relative longitudinal movement with respect to the journal recesses 16, thereby allowing the roller D to normally rest upon the seat 12, such trun nion means being held against relative lateral movement.

The operation of the device is as follows, assuming that the roller and rocker are moving toward the right as shown in dotted lines in Figure 1. During the normal position and the first portion of travel, the roller and rocker are held against relative movement, and move in unison, transmitting the load bodily through the roller to the bearing plate 14, this rocking movement continuing until the adjacent surfaces of the rocker E abut the guideway 10, whereupon further rocking movement is prevented. Upon relative movement of the bolster parts beyond the limits of the rocking movement of the rocker, the roller D will be permitted rotation due to the movement of the trunnion means 17 of the shaft 18 to the ends of the elongated openings 16, thereby radially lifting the roller D outwardly from the seat 12. When the load is released from the roller, the rocker due to its unbalanced condition will return to its normal position carrying the roller with it, during which movement the trunnion means 17 of the shaft 18 will return to the lower end of the slots 16 and the roller will again bear on the seat 12, so as to transmit the load bodily through the roller to the bearing plate 7.

It should be particularly observed that the aforesaid operation is brought about by providing a very limited vertical movement of the ends 17 of the shaft 18 in the recesses 16, this limited movement serving at the end of the movement of the rocker to permit radial raising of the periphery of the roller off of the seat 15 so as to allow rotation thereof, thus doing away with the necessity of providing laterally extending slots to accomplish this purpose. I

Inaddition, 'it is also particularly pointed out that the roller by this-arrangement is constantly maintained in central relation with respect to the rocker, not only during the normal position of the rocker, but. at all times within the limits of the rocking moverment of such rocker, so that there is no possibility of relative lateral play between the trunnion means of the roller, and the rocker, the movement which permits the rotation of the roller being effected only at the extreme limits of movement of the rocker and in the new position of the roller the same is still centered with respect to the rocker.

,1 have herein shown and described what I now consider to he the preferred mannerof carrying out my invention,but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of. the claim appended hereto.

v Iclaim;

In an anti-friction bearing, the combination with relatively movable bearing members presenting opposed extended bearing surfaces; arocker bearing on one of said suri y said roller is displaceable with respect to,

the bearing seat of the rocker when the rocker is tilted to either side of its normal centered position and the roller is supported by rotation on said trunnions free of said seat.

In witness that I claim the foregoing I have hereunto subscribed my name this 8th day of July, 1924. v

; JOHN F. OC ONNOR. 

